A quantitative push syringe

Abstract

This utility model discloses a quantitative push-type syringe, relating to the field of medical device technology. It includes a barrel, in which a piston is slidably engaged. A push rod is connected to one side of the piston. Four fins are evenly spaced on the outer wall of the push rod. A screw-in locking slot is provided at the end of each fin away from the push rod. A rotating sleeve is slidably fitted onto the outside of the four fins. A helical locking plate is provided on the inner wall of the rotating sleeve, and the inner side of the helical locking plate forms a screw-in engagement with the screw-in locking slot. A push plate is provided at the end of the push rod away from the piston. A threaded hole is provided on one side of the piston, and a threaded connector is provided at one end of the push rod. In this utility model, by cooperating with the helical locking plate on the inner wall of the rotating sleeve and the screw-in locking slot of the push rod fins, rotating the rotating sleeve moves it along the push rod. Combined with the axial scale line of the push rod for auxiliary positioning, the rotating sleeve is aligned with the required scale to determine the injection dose. The injection stops when the rotating sleeve abuts against the opening end of the barrel, achieving precise quantitative injection.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a quantitative push syringe. Background Technology

[0002] Syringes are commonly used medical devices and are widely used in medical injections, laboratory procedures, and other scenarios.

[0003] The prior art can be referenced in Chinese Patent No. CN219071594U, which discloses a rotary quantitative push syringe, including an outer sleeve and a pull-out inner core. The outer sleeve includes a barrel and a movable limiting mechanism, which is movably connected to the barrel. One end of the pull-out inner core is located inside the barrel, and the pull-out inner core is provided with a rotary thread. However, this syringe has a complex structure, and the amount of liquid medicine that the barrel can hold decreases during use, making it difficult to meet the needs of practical application scenarios. Therefore, a quantitative push syringe is provided here. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a quantitative push-type syringe. By cooperating with the spiral retaining plate on the inner wall of the rotating sleeve and the screw-connected retaining plate of the push rod, rotating the rotating sleeve can drive it to move along the push rod. Combined with the axial scale line of the push rod for auxiliary positioning, the rotating sleeve can be aligned with the required scale to determine the injection dose. The syringe stops when the liquid is pushed until the rotating sleeve abuts against the opening end of the cylinder, thus achieving precise quantitative injection and overcoming the shortcomings of existing technologies.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A quantitative push-type syringe includes a barrel, in which a piston is slidably engaged. A push rod is connected to one side of the piston. Four fins are evenly spaced on the outer wall of the push rod. A screw-in locking slot is provided at the end of each fin away from the push rod. A rotating sleeve is slidably sleeved on the outside of the four fins. A helical locking plate is provided on the inner wall of the rotating sleeve. The inner side of the helical locking plate forms a screw-in engagement with the screw-in locking slot. A push plate is provided at the end of the push rod away from the piston.

[0006] As a further embodiment of this utility model: a threaded hole is provided on one side of the piston, and a threaded joint is provided at one end of the push rod, wherein the threaded joint and the threaded hole form a screw connection.

[0007] As a further improvement of this utility model: the outer wall of the piston is fitted with a sealing ring, and the push rod, four fins and the push rod are integrally formed.

[0008] As a further improvement of this utility model, the outer wall of the push rod is provided with scale lines along its axial direction.

[0009] As a further improvement of this utility model: the closed end of the cylinder is provided with a liquid outlet, and a needle is fitted onto the liquid outlet.

[0010] As a further improvement of this utility model, two ear plates are symmetrically arranged on the outer wall of the open end of the cylinder.

[0011] As a further embodiment of this utility model: three support rods are provided at equal intervals on one side edge of the piston facing the push rod, and a support ring is connected to the end of the three support rods away from the piston. The outer wall of the support ring is slidably engaged with the inner wall of the cylinder.

[0012] As a further improvement of this utility model, the piston, support rod and support ring are integrally formed.

[0013] The beneficial effects of this utility model are as follows: 1. By cooperating with the spiral clamp plate on the inner wall of the rotating sleeve and the screw connection of the push rod fin plate, rotating the rotating sleeve can drive it to move along the push rod. Combined with the axial scale line of the push rod for auxiliary positioning, the rotating sleeve can be aligned with the required scale to determine the injection dose. The liquid is pushed until the rotating sleeve abuts against the opening end of the cylinder and then stops, realizing precise quantitative injection.

[0014] 2. The piston outer wall sealing ring ensures airtightness and prevents liquid leakage; the piston, support rod and support ring are integrally molded, and the support ring slides and snaps against the inner wall of the cylinder to improve the stability of piston movement; the push rod and piston are detachably connected, and the ear plate design makes it easy to hold, taking into account both practicality and stability. Attached Figure Description

[0015] Figure 1 This is a first-view three-dimensional structural diagram of a quantitative push-type syringe proposed in this utility model.

[0016] Figure 2 This is a second-view three-dimensional structural diagram of a quantitative push-type syringe proposed in this utility model.

[0017] Figure 3 This is a partial structural diagram of a quantitative push-type syringe proposed in this utility model.

[0018] Figure 4 This utility model proposes a quantitative push-type syringe. Figure 2 Enlarged structural diagram at point A in the middle.

[0019] In the diagram: 1. Cylinder; 2. Needle; 3. Ear plate; 4. Push rod; 5. Screw-in bayonet; 6. Fin plate; 7. Rotating sleeve; 8. Dispensing nozzle; 9. Piston; 10. Sealing ring; 11. Support rod; 12. Support ring; 13. Threaded joint; 14. Threaded hole; 15. Scale line; 16. Push plate; 17. Spiral clamping plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example 1, referring to Figure 1-4 A quantitative push syringe includes a barrel 1, in which a piston 9 is slidably engaged. A push rod 4 is connected to one side of the piston 9. Four fins 6 are evenly spaced on the outer wall of the push rod 4. A screw-in bayonet 5 is provided at the end of the four fins 6 away from the push rod 4. A rotating sleeve 7 is slidably sleeved on the outside of the four fins 6. A spiral retaining plate 17 is provided on the inner wall of the rotating sleeve 7. The inner side of the spiral retaining plate 17 is screwed into the screw-in bayonet 5. A push plate 16 is provided at the end of the push rod 4 away from the piston 9. A scale line 15 is provided on the outer wall of the push rod 4 along its axial direction.

[0022] The outer wall of piston 9 is fitted with a sealing ring 10, and push rod 4, four fin plates 6 and push rod 4 are integrally formed.

[0023] The closed end of the cylinder 1 is provided with a liquid outlet 8, and a needle 2 is sleeved on the liquid outlet 8. Two ear plates 3 are symmetrically arranged on the outer wall of the open end of the cylinder 1.

[0024] Three support rods 11 are equidistantly arranged on one side edge of the piston 9 facing the push rod 4. The end of the three support rods 11 away from the piston 9 is connected to a support ring 12. The outer wall of the support ring 12 is slidably engaged with the inner wall of the cylinder 1. The piston 9, support rods 11 and support ring 12 are integrally formed, which improves the movement stability of the piston 9.

[0025] After the liquid medicine is drawn into the cylinder 1, the rotating sleeve 7 drives the spiral clamp 17 to rotate and move at the screw joint 5. With the help of the scale line 15 for positioning, the end of the rotating sleeve 7 facing the cylinder 1 is aligned with the required scale, which is the injection dose. Then the injection operation can be performed. During the liquid pushing process, the liquid pushing ends when the rotating sleeve 7 abuts against the open end of the cylinder 1, thus realizing quantitative injection.

[0026] Example 2 is an optimization based on Example 1, specifically: A threaded hole 14 is provided on one side of the piston 9, and a threaded connector 13 is provided on one end of the push rod 4. The threaded connector 13 and the threaded hole 14 form a threaded connection.

[0027] By screwing the threaded connector 13 into the threaded hole 14, the piston 9 and the push rod 4 can be detachably connected, which facilitates recycling and reduces the waste of resources.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A quantitative push-type syringe, comprising a barrel (1), characterized in that, A piston (9) is slidably engaged in the cylinder (1). A push rod (4) is connected to one side of the piston (9). Four fins (6) are evenly spaced on the outer wall of the push rod (4). A screw-in bayonet (5) is provided at the end of the four fins (6) away from the push rod (4). A rotating sleeve (7) is slidably sleeved on the outside of the four fins (6). A spiral clamp (17) is provided on the inner wall of the rotating sleeve (7). The inner side of the spiral clamp (17) forms a screw-in engagement with the screw-in bayonet (5). A push plate (16) is provided at the end of the push rod (4) away from the piston (9).

2. A quantitative push-type syringe according to claim 1, characterized in that, The piston (9) has a threaded hole (14) on one side, and the push rod (4) has a threaded connector (13) at one end. The threaded connector (13) and the threaded hole (14) form a threaded connection.

3. A quantitative push-type syringe according to claim 2, characterized in that, The piston (9) is fitted with a sealing ring (10) on its outer wall. The push rod (4), four fins (6) and the push rod (4) are integrally formed.

4. A quantitative push-type syringe according to claim 1, characterized in that, The outer wall of the push rod (4) is provided with scale lines (15) along its axial direction.

5. A quantitative push-type syringe according to claim 4, characterized in that, The closed end of the cylinder (1) is provided with a liquid outlet (8), and a needle (2) is sleeved on the liquid outlet (8).

6. A quantitative push-type syringe according to claim 5, characterized in that, Two ear plates (3) are symmetrically arranged on the outer wall of the open end of the cylinder (1).

7. A quantitative push-type syringe according to claim 1, characterized in that, The piston (9) has three support rods (11) arranged at equal intervals on one side edge facing the push rod (4). The end of the three support rods (11) away from the piston (9) is connected to a support ring (12). The outer wall of the support ring (12) is slidably engaged with the inner wall of the cylinder (1).

8. A quantitative push-type syringe according to claim 6, characterized in that, The piston (9), support rod (11) and support ring (12) are integrally formed.

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